Income Taxes - Net Tax Effect of State and Foreign Loss Carryforwards (Details) $ in Millions	Jan. 01, 2017 USD ($)
Operating Loss Carryforwards [Line Items]
No expiration	$ 33.5
Total	36.4
2017-2019
Operating Loss Carryforwards [Line Items]
Total	1.9
2020-2022
Operating Loss Carryforwards [Line Items]
Total	0.7
2023-2026
Operating Loss Carryforwards [Line Items]
Total	0.2
2027-2029
Operating Loss Carryforwards [Line Items]
Total	$ 0.1